Radiant gas heater



May 26, 1925.

w. H. CAIN RADIANT GAS HEATER Filed Jun; 19. 1924 Patented May 26, 1925.

UNITED STATES Winner/i n. oam, or LOS emer tus, ca aronnm,

RAEDIANT GAS HEATEFEt.

Application filed June 19, 1924. Serial No. 720,949.

T 0 (all whom it may concern:

Be it known that I, WILLIA H. CA N, a citizen of the United States, residing at Los ringeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Radiant Gas Heaters, of which the following is a specilication.

This invention relates to radiant gas heaters, and consists of the novel features herein shown, described and claimed.

An object is to make a radiant gas heater adapted to feed warm air to the outer sides of the flames so as to improve the combustion and increase the temperature of the radiant elements.

Another object is to construct a radiant heater so as to take warm air downwardly from the top of the back side of the frame and feed the warm air into the radiant elements along with the flames to increase the radiance and luminosity of the elements.

Another object is to make an imperforate box around the combustion chamber, extend the radiant elements into the box, and feed warm air to the box around the flames into the radiant elements.

Other objects and advantages will appear from the drawings and specification.

The drawings illustrate a radiant gas heater embodying the principles of my inveution.

Figure 1 is a sectional elevation of the radiant gas heater on the line 11 of Fig. 2.

2 is a vertical cross section on the line 22 of Fig. 1.

Fig. 3 is a rear sectional elevation as indicated by the line 33 of Fig. 2 and looking in the direction indicated by the arrows.

The details of construction and operation shown in the drawings are as follows:

With the exception of the burner 1, the main frame of the gas heater is constructed of sheet iron. The horizontal base plate 2 is mounted upon legs 3 and the burner 1 is supported through the plate 2. The gas burner jets 4 are at the top of the burner 1 and above the base 2. lValls 5, 6, 7 and 8 extend upwardly from the bottom 2 and a top 9 is inserted horizontally upon the walls 5, 6, 7 and 8 to produce an imperforate box having a chamber 10. The flames 11 above the burner screen 4 are within the chamber 10 and the radiant elements 12 extend through the top 9 so that the flames 11 are discharged upwardly into the lower ends of the radiant elements 12.

A front wall 13 extends upwardly from the top 9 and a rear wall 1% extends upwardlyfrom the wall 6, there being air intake openings 15 at the top of the wall 14. Battle plates 16, 17, 18, 19 and 20 are arranged between the walls 13 and 14 and are staggered longitudinally, the battles being shortor than the back 14L so as to produce a zigzag air passage 21 leading downwardly from the intake openings 15 through an opening 22 in the top 9 and discharge into the chamber 10.

The process of combustion on top of the burner jets 4 will draw, the fresh warm air from the chamber 10 into the flames and into thelower ends of the radiant elements 12, thereby improving the combustion and increasing the temperature and luminosity of the radiant elements. The flow of fresh air through the passage 21 will materially reduce the temperature of the back 13 and raise the temperature of the air. The in take of air through the openings 15 is remote from the fire and the air will be reasonably pure and rich in oxygen.

The front of the heater is open at the opposite side of the elements 12 from the wall 13, and the air heated by the elements 12 will be discharged through this open side as shown in Fig. 2.

Various changes may be made without departing from the spirit of the invention as claimed. 1

I claim:

1. A radiant gas heater having a box, radiant elements extending through the top of the box, a burner having jets in the box and discharging into the radiant elements, and means forming a zigzag air passage downwardly back of the radiant elements and discharging into the box.

2. A radiant gas heater having a box, radiant elements extending through the top of the box, a burner having jets in the box and discharging into the radiant elements, and means forming an air passage downwardly back of the radiant elements and discharging into the box.

3. A radiant gas heater having a box, radiant elements extending through the top of the box, a burner extending through the bottom of the box and having jets discharging into the lower ends of the radiant elements, a wall back of the radiant elements,

and a second wall back of the first wall and forming an air passage discharging clownwardly into the box.

4. A radiant gas heater comprising in combination a box, a plurality of radiant ele ments extending downward through the top of the box, a burner extending through the bottom of the box and having jets discharging into the lower end of the radiant elements, a double wall at the back of the heat or having apertures at the top situated on a side opposite to that on which the products of combustion pass, and a passage for air from the apertures between the double Walls to the box and burner.

5. A radiant gas heater having a box, vertical cylindrical radiant elements extending through the top of the box, a burner extending through the bottom of the box and having jets for each radiant element discharging into the lower end thereof, a wall back of the radiant elements, a second wall back of the first wall, a zig-zag passage between the walls, and air apertures at the top of the back wall leading through the zigzag pas sageto the box and forming the sole air inlet to the box.

- In testimony whereof I have signed my nameto this specification.

V. H. CAIN. 

